how to check in a script if updates are available

[Lentes, Bernd]

----- On Mar 29, 2022, at 4:27 PM, Liam Proven lproven at gmail.com wrote:

> 
> The `snapper` tool from openSUSE does precisely this, and it's FOSS
> and it runs on Ubuntu.
> 
> http://snapper.io/
> 
> I don't know if you are rolling your own, but this may make it easier.
> 

Hi Liam,

i didn't manage to install snapper because of a dependency which is so-called 
"not installable".

While googling i stumbled across https://www.cyberciti.biz/faq/how-to-set-up-automatic-updates-for-ubuntu-linux-18-04/.
It gave me the hint to use unattended-upgrades.
First i start unattended-upgrades --dry-run. If i have an output then there is something to install.
If no output, nothing to install.

That solved the problem for me.

Bernd
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